MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

Download Now


AR-15 Foregrip - Larger scale for bigger rails

by phreak42x Nov 7, 2013
Download All Files

Thing Apps Enabled

Please Login to Comment

can you post a version that is the same except without the grooves? my printer messes them up every time even with support.

How are you printing it? I had the best print results, with the rail side down on the print bed and handle pointing straight up. Also what layer thickness are you set to? I don't recall having any issues printing the grooves in the handle. I don't even think it used supports for that part. I didn't create this foregrip myself, I just remixed someone elses design, and scaled it larger to fit the standard rail size. I MIGHT be able to figure out how to patch it over, but I'm no expert lol.

The layer. Height is .05 mm (50um). I am using support but my slicing software (cure) womt add supports in the grooves because if how small they are

I also recommend a better printing software. I've never used CURE, but I know that a good printing program goes a long way to making better prints. I use the Makerbot software, since my printer is a clone and has the makerbot firmware.

wow... .05mm is SUPER thin. Most 3d printers only go down to 0.1mm (I have a makerbot clone, flashforge creator dual extruder). I believe I printed mine at 0.3mm. Try a thicker extrusion and see if it helps.

what infill should i use? 10% broke when i tried to pull it off the rail.

I think I used 30%, maybe 60%. You don't want it TOO hollow(10% way too little), because it has to handle the recoil+weight of the gun. If you have the plastic to spare, make it as tough as you can, maybe 70-80% infill(I think I used 70%). Mine is pretty solid, fired over 2k rounds, carried it by the foregrip, used the foregrip as a bench rest, and still hasn't budged or shown signs of cracking.

I figured out how to print with out supports...Can't believe it took me so long to figure out some thing so simple...lol

how do I print with out supports?

I made this and it fits my rails like a glove. No wiggle room whatsoever even without a screw. Thanks!

What size screw do you use?

BeanieBro - It's been several years since I made this, but stabbing wildly in the dark, I'm guessing that I used M5 screws (5mm). probably 40mm long? You'd have to measure your rail to be sure, but just thinking about what I had on hand at the time.. M5 x 40mm sounds right in my head.

By the way, that foregrip I printed back in 2013, is still attached and working, 6 years and thousands of rounds later.

Good luck!

Is it still working?
I'm thinking of making this

3 years and 4000+ rounds. Still going strong. Love it.

If your making it as a legitimate fore-grip, I would advise against it. Mine snapped after a year of use when I least expected it. Not very safe.

What print settings and infill density did you use? I've put over 4000 rounds through mine, and use the grip as a handle, swing it around by it all the time. I'm guessing you cheaped out and didn't have the density settings high enough, or print settings not correct. I'm past 3 years of having this foregrip and no sign of failure yet.

No problem! Mine came out snug too, but I put a screw in for good measure! :)

No problem! Mine came out snug too, but I still put a screw in for good measure :) caliper